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Im in Texas. I will check into the obd scan. So, i can run the jdm ecu with my dash harness. The obd2 scanner will not work. If i need to.scan the ecu i will have to connect directly to it. If my state does check the engine year info when getting an inspection i can just unhook the jdm ecu and replace it with my usdm ecu. There shouldn't be any issues, just that my avcs will not work.

TX state inspection scanners did not like my jdm ecu at 2 locations in Houston. They kept dropping the signal and wouldn't finish a particular test, even with the forced pass bit set.
You might as well save time by using your usdm ecu for inspection.

Edit: the homologation sheets revealed that the very first new age GDB bugeye Sti, called the Type RA (before the appearance next year in '02 of the Spec C), had bigger ports, due to an additional radius smoothing of 0.5mm and removal of the casting shoulder by the valve guide.

To be noted is that in GRB, the intake ports become gigantic by impreza standards, for the Spec C.

The V8 and V9 all have the same big ports.
The V7 were all the same part number for heads, big ports.

Iy was said that the EJ207 for all other markets had small ports. I never bothered to check the part numbers for heads for EJ207 from other markets than Japan.
I've seen before an Australian posting suggesting that their market had big ports at one point for the EJ207.
The main obstacle with those is that many markets had immobilizers very early on.
In UK, I think they may have had immobilizers as early as V7, maybe even the Prodrive P1 in a GC8.
So importing one of those may prove to be an additional headache, even if the early immobilizers were less extensive in their needs than a USDM Sti immobilizer.
But if someone along the importing route drops the ball and msimatches the ECU, keys and immobilizer ECU, that engine will not start.

subscribed, and i am sorry its late and i am tired. I did read, but am missing which version has big port heads. Also by law these motors/cars are must be sold at what mileage on the island of Japan?

There is no law that any car must be sold at a particular mileage in Japan.
There is an incentive for owners to get rid of their cars at a certain age due to rising rate of taxes the older the car gets. This is to "persuade" the public to get newer cars to meet increasingly stricter Japanese DOT standards, emissions, etc.

There is a fundamental gap here. The JDM never had Sti with single AVCS, drive by wire, non canbus, 32bit.
There will be a need to pass state inspection as well.
The plugs at the JDM ECU will not match the connectors in the USDM 32bit harness.
Converting the harness to make the JDM ECU fit can probably be done, but it's a one way street as far as ever plugging the USDM ECU back in.
The immobilizer of the USDM ECU feature will be lost too.

This swap has been successfully done by 4 members on the board so far, via machining and adapting the crank and cam sensors, so that the USDM ECU can control the JDM engine. Either somebody is going to make available a swap kit for this option, or you will need a machine shop assistance to get the swap to work, or you modify the harness at the ECU, and understand that state computers will never talk to it, so it's a race only vehicle.

I have tried to search for people doing this swap. I have only come across one or two. Do you recall which members have done this? I would like to follow and track their steps of getting the 207 to work.

I'm currently working on mine and have changed out the 207 cams and cam sensors which give and read a negative signal to the jdm ecu but the 07 usdm sti would be reading positive signals. I installed stock 07 usdm sti cams and cam sensors so far. I'm in the process of bolting up the last pieces to try and start it.

I have tried to search for people doing this swap. I have only come across one or two. Do you recall which members have done this? I would like to follow and track their steps of getting the 207 to work.

I'm currently working on mine and have changed out the 207 cams and cam sensors which give and read a negative signal to the jdm ecu but the 07 usdm sti would be reading positive signals. I installed stock 07 usdm sti cams and cam sensors so far. I'm in the process of bolting up the last pieces to try and start it.

^^^ Thank you soooo much for this. I feel much more confident in my swap now. I am happy that I've been able to do the right steps. Now I just need to figure out my tuning. So far everyone I've spoken to seems to not understand how to approach the swap. It's still "impossible" for them.

I'm in the middle of my EJ207 swap into a 32bit car right now with the help of Luke and Amroof as they indicated above and there are a lot of nay-sayers out there. A prominent big-name tuner who frequents the EJ207 owners' thread comes to mind...

The fact is that I've personally seen and driven one of these swap cars and will soon drive my own. Very much possible and very much awesome. Look for my thread on it in the coming weeks to see progress.

^^^ Thank you soooo much for this. I feel much more confident in my swap now. I am happy that I've been able to do the right steps. Now I just need to figure out my tuning. So far everyone I've spoken to seems to not understand how to approach the swap. It's still "impossible" for them.

I have basemaps for this swap on an 05 fozzie rom and an 06 WRX rom if you need some guidance, both e85 and 91oct. I even transferred over the cranking and startup tables so they start and run like factory.

Shoot me a PM and Ill send you something to get started with if you want. The powerband these engines have on the USDM cams is pretty nice as well, good low end torque and no trouble going to 8K+

And like Ken said, EVERYONE told us it was impossible so that makes it even more fun

I have basemaps for this swap on an 05 fozzie rom and an 06 WRX rom if you need some guidance, both e85 and 91oct. I even transferred over the cranking and startup tables so they start and run like factory.

Shoot me a PM and Ill send you something to get started with if you want. The powerband these engines have on the USDM cams is pretty nice as well, good low end torque and no trouble going to 8K+

And like Ken said, EVERYONE told us it was impossible so that makes it even more fun

That would help me a lot. I'm wanting to try out E85 still. It's not really too accessible yet and I don't have a UTEC for map switching anymore since the ECUs are different. The cranking and start up tables sound enticing. haha.

PM coming your way. That's also good news to hear the USDM cams suit these engines quite well. I ran this engine before in my old chassis so I'm antsy to get back on it. I've been waiting a LONG time! I miss going over 7k with a decent motor. I've been driving a 1.6L SOHC SR5 corolla as my daily with this being down. It's excruciating slow. haha.

Well, thanks, let's hope that works out.
But for now, I've compacted to the max, relocated and later on will try to add pics, let's see what happens.

I don't know if you took the time to look into the homologation sheets, but wanted to give you the info that you can compare your work with the cams with some factory info, may be interesting, if you didn't do it already.

Edit: the homologation sheets revealed that the very first new age GDB bugeye Sti, called the Type RA (before the appearance next year in '02 of the Spec C), had bigger ports, due to an additional radius smoothing of 0.5mm and removal of the casting shoulder by the valve guide.

To be noted is that in GRB, the intake ports become gigantic by impreza standards, for the Spec C.

The V8 and V9 all have the same big ports.
The V7 were all the same part number for heads, big ports.

Iy was said that the EJ207 for all other markets had small ports. I never bothered to check the part numbers for heads for EJ207 from other markets than Japan.
I've seen before an Australian posting suggesting that their market had big ports at one point for the EJ207.
The main obstacle with those is that many markets had immobilizers very early on.
In UK, I think they may have had immobilizers as early as V7, maybe even the Prodrive P1 in a GC8.
So importing one of those may prove to be an additional headache, even if the early immobilizers were less extensive in their needs than a USDM Sti immobilizer.
But if someone along the importing route drops the ball and msimatches the ECU, keys and immobilizer ECU, that engine will not start.

Quote:

Originally Posted by fastnoypi

There is no law that any car must be sold at a particular mileage in Japan.
There is an incentive for owners to get rid of their cars at a certain age due to rising rate of taxes the older the car gets. This is to "persuade" the public to get newer cars to meet increasingly stricter Japanese DOT standards, emissions, etc.

TX state inspection scanners did not like my jdm ecu at 2 locations in Houston. They kept dropping the signal and wouldn't finish a particular test, even with the forced pass bit set.
You might as well save time by using your usdm ecu for inspection.

I had to disable the tgv sensors on the usdm ecu to clear codes and a check engine light. I had to drive it 50 miles for readiness the first time I went to get inspected after just swapping to the USDM ecu, now it's all forced ready so no need to drive it to readiness after swapping ecu. Just like mr. fastnoypi states bellow, really helps simplify the process, thank you sir.

You'll have to disable the tgv sensors on the usdm ecu or you'll have codes and a check engine light. When you swap the ecu you'll have to drive about 50 miles keeping it under 60 mph to clear all the monitors. I got my inspection sticker with the usdm ecu, the dmv machine wouldn't communicate with the jdm. Now I know how to do it, my usdm ecu is in a safe waiting to get used again next year.

I think that response is to bugeyebetty, but yes, you do have to disable the tgv related codes on the usdm ecu. Just set your injector scaling, fuel and timing tables accordingly for your mods. It doesnt need to be perfect but close enough so you arent dumping fuel if your state uses the sniffer.
You don't need to drive 50 miles, etc... just force pass the readiness monitor bit on.